Oil-well pump



Apyifl 19 19270 B. THURSTON OIL WELL PUMP Filed March 10, 1926 INVENTOR(16 72/1/2513 Wang,

ATTORNEYS Patented Apr. 19, 1927.

TATE ATENT FFICE.

CHARLES B. THURSTON, or} oILDaLE, CALIFORNIA, ASSIGNOB. on ONE-THIIRD T0WINFIELD s. BUCHNERL AND ONE-SIXTH T0 ROBERT B. THURSTON, BOTH or 0ILDALE, CALIFORNIA.

OIL-WELL PUMP.

Application fil ed March It), 1926. Serial No. 93,653.

This invention relates to an improvement in oil well pumps of the typeforming the subject matter of a co-pending applicatlon filed March 18,1925, Serial #16344, allowed June 22, 1925, renewed February 10,

- 1926, and allowed February 17, 1926.

The object of the present invention is 'to provide an oil well pumpwhich has all of the advantages and capacities of the pump forming thesubject matter of my co-pending application, and of pumps of this type,and which also eliminates the possibility of sand settling upon andscoring'the outer periphcry of the stationary plunger, and which alsoaffords from the plunger an unobstructed discharge of maximum internalarea.

A. further object resides in the provision of an oil well pump havingthese advantages and capacities and which is of simple and durableconstruction, reliable and eificient in operation, and easy andcomparatively inexpensive to manufacture.

A further object is to provide a pump of this character wherein anydesired number of liners may be provided in the working barrel forco-action with the plunger.

Another object iesides in the provision of an oil well pump having noveland effective means for pulling the plunger out of the tubing or casingwhen desired.

Other objects and advantages reside in cer-- tain novel features of theconstruction, arrangement and combination of parts which will behereinafter more fully described and particularly pointed out in theappended claims, reference being had to the accome panying drawingsforming a part of this specification, and. in which:

Figure 1 is a fragmentary view'partly in section and partly in elevationshowing an oil well pump constructed in accordance with the presentinvention,

Figure 2 is a fragmentary view in ver' tical section showing the upperportion of the pump, and

Fi ure 2 is a View similar to Figure 2, but showing the lowerportion ofthe pump.

Referring to the drawings, the numeral '1 designates the tubing orcasing on the lower end of which'a standing valve barrel, or shoe 2 isthreaded. A-standing valve body 1 is fitted in the shoe 2'and has avalve seat 5' secured onits upper end by means of a valve ca e 6threadedly connected with the valve b0 y 4, and clamping a flange 5 onthe valve seat 5 against the upper end of the valve body 1. In the valvecage (3 a ball valve 7 is provided and co-acts with the seat 5. Theupward movement of the ball valve 7 away from its seat 5 is limited bymeans of a cross pin 8. A stationary plunger 9 having the form of anopen ended tube of uniform cross section from end to end, is provided,and has its lower end fastened by means of a coupling 10 on the upperend of a plunger extension 11, the plunger extension 11 also being inthe form of an open ended tube of uniform cross sec-' tion-from end toend, the lower end of the plunger extension 11 being threadedlyconneeted'as'at 12 to the valve cage '6. The counected with the acket 15of the working barrel, and snugly and slidably fits the outer peripheryof the stationary plunger.

A lock nut 18 is provided for securing the adapter and coupling 17 inproperly adjusted position. A jacket extension 19 has its upper endthrcadedly connected with the combined-adapter coupling 17 and at itslower end this jacket extension 19 has threadedly connected thereto acombined pull nut and guide 20 which slidably cmbraces the extension 11of the plunger, and

which is engageable with the abutment or coupling 10 when it isdesirable to pull the plunger out of the casing or. tubing 1.

A bushing 25 is threaded into the upper end of the jacket 15 and engagesthe upper liner 16, the bushing coacting with the adapter 17 to hold theliner 16 properly positioned inthe jacket 15. A travelling valve seat 26rests on the bushing 25 and has a flange 26 clamped to the bushing 25 ba portion of the travelling valve cage 2;, the travelling valve cage 27bein threadedly connected with the upper end of the bushing 25. As shownto advantage in- Figures 1 and 2, the travelling valve cage 97 hasdischarge openings 28 and also has a threaded connection or couplingmember 29 adapted to be connected with the string of rods or the othermeans employed to impart reci'procatory movement to the working barrel.

With this organization and construction it will be apparent from aconsideration of Figure 2 that in all operative positions of the workingbarrel the liners will snugly engage the plunger and will prevent sandfrom settling outside on the periphery of the plunger. Pocketspermitting the aecumulation of sand are eliminated from theconstruction. v

Another important feature resides in the fact that the discharge end,that is, the upper end of the plunger is unobstructed, and affords themaximum internal discharge area thereby increasing the eiliciency of thepump. Along with all of these advantages, the plunger may be readilypulled from the tubing when the pull nut 20 has been moved intoengagement with the coupling 10.

1. An oil well pump including a casing having a standing valve shoe, astanding valve body fitted in the shoe, a stationar tubular plungerlocated in the casing, an extension between the lower end of the neaaaaoplunger and the standing valve body, an external coupling between theplunger and its extension, :1 reciprocable working barrel having ajacket and liners within the jacket and extending from end to endthereof, an adapter connected with the lower end of the jacket andsupporting the liners at their lower end, a bushing connected to theupper end of the jacket and holding the liners against the adapter, atravelling valve mounted on said bushing, a jacket extension carried bythe adapter, and a pull nut car ried by the lower end of the jacketextension and engageable with the couplin".

2. An oil well pump including a casing having a standing valve shoe, astanding valve body fitted in the shoe, a stationary tubular plungerlocated in the casing, an extension between the lower end of the plungerand the standing valve body, a reciprocable working barrel having ajacket and liners within the jacket and extending from end to endthereof, an adapter connected with the lower end of the jacket andsupporting the liners at their lower end, a lnishing connected to theupper end of the jacket and holding the liners against the adapter, anda travelling valve mounted on said bushing.

cnannns B. THURSTON.

